Philadelphia ? Roy Halladay and Tim Lincecum have little in common except performance on the mound.

Philadelphia Phillies pitcher Roy Halladay, left, and San Francisco Giants pitcher Tim Lincecum meet with the media on Friday in Philadelphia. Halladay and Lincecum will be the starting pitchers in Game 1 of the NLCS tonight in Philadelphia.

Philadelphia Phillies pitcher Roy Halladay, left, and San Francisco Giants pitcher Tim Lincecum meet with the media on Friday in Philadelphia. Halladay and Lincecum will be the starting pitchers in Game 1 of the NLCS tonight in Philadelphia.

Nicknamed the Freak, Lincecum is a shaggy-haired, skinny kid who looks more like a bat boy than one of the best pitchers in the majors.

Known as Doc, the bearded Halladay is bigger, stronger and can probably pass for a professor.

Lincecum is quirky. He has an unorthodox delivery, doesn’t ice his arm and munches on treats like Philly cheesesteaks or ice cream before starts.

Halladay is robotic. He has perfect mechanics, a tireless work ethic and doesn’t let anything prevent him from following his routine.

Who’s the better pitcher?

They’ll showcase their stuff when the San Francisco Giants play the two-time NL champion Philadelphia Phillies in Game 1 of the league championship series tonight at Citizens Bank Park.

“It’s going to be a tremendous matchup,” Giants manager Bruce Bochy said Friday. “You have two of the best pitchers in the game. We have all the respect for Halladay. Tremendous command in the strike zone, great stuff, great competitor. And, we have a good one going, too. Two different styles. Their guy’s probably a little bit more conventional than Tim with his unique delivery. But when it comes down to it, he’s in the same position. They have four-plus pitches they can throw at any time with good command.”

Both pitchers were sensational in their postseason debuts last week.

Halladay threw the second no-hitter in postseason history in Philadelphia’s 4-0 victory over Cincinnati. A day later, Lincecum tossed a two-hitter with 14 strikeouts in San Francisco’s 1-0 win over Atlanta.

Neither guy expects an encore. It doesn’t mean they’re not trying.

“That’s the beauty of it. I don’t look at it as pressure. I look at it as a challenge,” Halladay said. “Getting to this point, you put in so much work to get here that once you do, it’s been nothing but excitement. And you don’t feel like there’s a certain standard you have to live up to. I feel like I need to go out and pitch the way that I normally pitch, execute pitches and be aggressive. It’s been nothing but a challenge and something I look forward to. I just haven’t felt the pressure of having to live up to something or do something.”

Lincecum certainly won’t be overwhelmed by the spotlight.

“You get a taste of what it’s like to play in postseason ball. I think it can’t do anything but help me,” he said about his success in his first start. “I feel like the All-Star game last year helped me prepare for the postseason scenario, just with the heightened atmosphere and how crazy it gets. But my approach on this game is the same as any other start Obviously, it’s a big game. But I don’t want to get too overamped. I want to take it just like any other start.”

Halladay lived up to enormous expectations in his first season in Philadelphia after 12 years with Toronto. The 33-year-old right-hander finished 21-10 with a 2.44 ERA.